Cephea Early Feasibility Study

Key Inclusion Criteria: * Mitral valve disease resulting in mitral regurgitation (MR ≥ Grade III) and/or severe mitral valve stenosis (mitral valve area ≤ 1.5cm²) per American Society of Echocardiography criteria. * LVEF ≥ 30% * In the judgement of the Site Heart Team, transcatheter therapy is deemed more appropriate than open heart surgery. Key Exclusion Criteria: * Prior surgical or interventional treatment that interferes with the Cephea valve delivery or function. * Need for emergent or urgent surgery.